RESEARCH

Research Clusters

Study of First-Generation Objects in the Universe with Radio Telescopes

Research Keyword: radio astronomy, big data, machine learning, AI

It is predicted that the first astronomical objects in the 13.8-billion-year history of the Universe were formed around 100 million years after the birth of the Universe, but there is still no observational evidence to support this. The 21 cm radio lines from neutral hydrogen atoms, which filled the Universe at that time and were the material for the formation of astronomical objects, are the focus of this research, and radio telescopes are used to detect them in order to search for the first astronomical objects in the Universe.

Study of First-Generation Objects in the Universe with Radio Telescopes

Cluster members

  • Japan
    Coordinator
    Keitaro TAKAHASHI
    Professor, Faculty of Advanced Science and Technology, Kumamoto University
    Japan
  • Australia
    Rachel WEBSTER
    Professor, The University of Melbourne
    Australia
  • Australia
    Bart PINDOR
    Professor, The University of Melbourne
    Australia
  • Japan
    Shintaro YOSHIURA
    JSPS Researcher, National Astronomical Observatory of Japan
    Japan
  • Japan
    Takuya AKAHORI
    Researcher, National Astronomical Observatory of Japan
    Japan
  • Japan
    Takeshi FUKUSAKO
    Professor, Faculty of Advanced Science and Technology, Kumamoto University
    Japan
  • Japan
    Ryo KATO
    Researcher, Faculty of Advanced Science and Technology, Kumamoto University
    Japan

Achievements

Publications

 
"Precision of localization of single gravitational-wave source with pulsar timing array"
Ryo Kato, Keitaro Takahashi
Physical Review D, 108 (2023) 12, 123535
https://doi.org/10.1103/PhysRevD.108.123535

“A Parkes "Murriyang" Search for Pulsars and Transients in the Large Magellanic Cloud”
Shinnosuke Hisano, Fronefield Crawford, Victoria Bonidie, Md F. Alam, Keitaro Takahashi, Duncan R. Lorimer, Josh P. Ridley, Maura M. McLaughlin, Benetge B. P. Perera,
The Astrophysical Journal, Volume 928, Issue 2, id.161, 11 pp., 04/2022

 “Low-frequency wideband timing of InPTA pulsars observed with the uGMRT”
K Nobleson, Nikita Agarwal, Raghav Girgaonkar, Arul Pandian, Bhal Chandra Joshi, M A Krishnakumar, Abhimanyu Susobhanan, Shantanu Desai, T Prabu, Adarsh Bathula, Timothy T Pennucci, Sarmistha Banik, Manjari Bagchi, Neelam Dhanda Batra, Arpita Choudhary, Subhajit Dandapat, Lankeswar Dey, Yashwant Gupta, Shinnosuke Hisano, Ryo Kato, Divyansh Kharbanda, Tomonosuke Kikunaga, Neel Kolhe, Yogesh Maan, Piyush Marmat, P Arumugam, P K Manoharan, Dhruv Pathak, Jaikhomba Singha, Mayuresh P Surnis, Sai Chaitanya Susarla, Keitaro Takahashi,
Monthly Notices of the Royal Astronomical Society, Volume 512, Issue 1, pp.1234-1243, 05/2022

 “On the Potential of Faraday Tomography to Identify Shock Structures in Supernova Remnants”
Shinsuke Ideguchi, Tsuyoshi Inoue, Takuya Akahori and Keitaro Takahashi,
Monthly Notices of the Royal Astronomical Society, Volume 513, Issue 3, pp.3289-3301, 07/2022

 “Wavelets and sparsity for Faraday tomography”
Suchetha Cooray, Tsutomu T. Takeuchi, Shinsuke Ideguchi, Takuya Akahori, Yoshimitsu Miyashita, Keitaro Takahashi,
Publications of the Astronomical Society of Japan, Volume 75, Issue Supplement_1, February 2023, pp.S85-S96

“The Indian Pulsar Timing Array: First data release”
Pratik Tarafdar, Nobleson K., Prerna Rana, Jaikhomba Singha, M. A. Krishnakumar, Bhal Chandra Joshi, Avinash Kumar Paladi, Neel Kolhe, Neelam Dhanda Batra, Nikita Agarwal, Adarsh Bathula, Subhajit Dandapat, Shantanu Desai, Lankeswar Dey, Shinnosuke Hisano, Prathamesh Ingale, Ryo Kato, Divyansh Kharbanda, Tomonosuke Kikunaga, Piyush Marmat, B. Arul Pandian, T. Prabu, Aman Srivastava, Mayuresh Surnis, Sai Chaitanya Susarla, Abhimanyu Susobhanan, Keitaro Takahashi, P. Arumugam, Manjari Bagchi, Sarmistha Banik, Kishalay De, Raghav Girgaonkar, A. Gopakumar, Yashwant Gupta, Yogesh Maan, P. K. Manoharan, Arun Naidu, Dhruv Pathak,
Publications of the Astronomical Society of Australia, Volume 39, article id. e053, 10/2022
*The results of this research was sent out to the media as a press release.

 “Introduction to Faraday tomography and its future prospects”
Keitaro TAKAHASHI,
Publications of the Astronomical Society of Japan, Volume 75, Issue Supplement_1, February 2023, Pages S50–S84

 

Grants

科学研究費補助金基盤研究B（2021年度〜2024年度）・代表・直接経費：13,200,000円

Activities

Group photo at a meeting in Chennai, India

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